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Specta Journal of Technology
Published by Institut Teknologi Kalimantan
ISSN : 25492713     EISSN : 26229099     DOI : https://doi.org/10.0610/specta.v2i3
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Environmental Science
SPECTA journal is published by Lembaga Penelitian dan Pengabdian kepada Masyarakat, Institut Teknologi Kalimantan, Balikpapann Indonesia. SPECTA is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in the field of Physics, Mathematics, Mechanical Engineering, Electrical Engineering, Chemical Engineering, Materials and Metallurgy, Civil Engineering, Industrial Engineering, Naval Engineering, Urban Planning, Informatics, Information System, Environmental Engineering, and Ocean Engineering. SPECTA accepts submission from all over the world, especially from Indonesia.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 325 Documents
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Evaluasi Rencana Tata Ruang Wilayah Kota Pangkalpinang Tahun 2011-2030 Berdasarkan Sebaran Kerawanan Banjir Fitriansyah, Hadi; Ajrina, Fadiah Izzah; Caesar, Muhammad Yusuf; Maulidya, Haya Aqilah
SPECTA Journal of Technology Vol. 8 No. 3 (2024): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v8i3.1204

Abstract

Flooding occurs when river water overflows and inundates the surrounding flat areas due to the river's inability to contain excess water. Pangkalpinang City, as the capital of Bangka Belitung Islands Province, has several locations that are prone to flooding during the rainy season. There have been 192 flood incidents across seven districts, making it crucial for decision-makers to identify flood-prone areas for planning purposes and to better understand the vulnerable regions to implement more effective preventive measures. This study aims to map the distribution of flood-prone areas and analyze the correlation between the spatial plan of Pangkalpinang City for 2011-2030 and flood-prone regions. The study uses scoring, weighting, and overlay methods with ArcMap 10.8 software. The data used in this study include slope gradient, elevation, soil type, land use, and rainfall. It is important to evaluate the Spatial Plan of Pangkalpinang City for 2011-2030 concerning flood vulnerability. The results of the study show that flood hazard classes in Pangkalpinang City are dominated by the low hazard class covering an area of 910.74 ha, the moderate hazard class covering 5,959.63 ha, and the high hazard class covering 3,559.90 ha. The benefits of evaluating the spatial plan of Pangkalpinang City based on flood vulnerability distribution include raising awareness among the government and the public regarding flood disasters, enabling the city government to utilize the results to strengthen flood mitigation efforts, improving the effectiveness of planning and environmental management, and optimizing land use. The spatial plan based on flood-prone areas shows that the protected area, covering 1,274.98 ha, predominantly falls into the high flood-prone category, while the cultivation area, covering 5,275.52 ha, predominantly falls into the moderate flood-prone category.
Selection of Student Housing Types for Universitas Trisakti in DKI Jakarta Adriana, Martina Cecilia; Situmorang, Rahel; Supriyatna, Yayat; Yahya, Wisely; Aprianto, Kezia Rianka Putri
SPECTA Journal of Technology Vol. 8 No. 3 (2024): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v8i3.1208

Abstract

The large number of students has implications for the need for housing during their studies around the campus area. Students need temporary living conditions in a location as part of the life cycle of young people in the phase of leaving their parents for educational purposes. Many factors result in the diversity of housing typologies needed by students. Fulfilling students' expectations of housing will create comfort and will also affect the performance of the students' studies. Research related to student housing preferences in Jakarta, which is the most densely populated city in Indonesia, is still rare. This research method is quantitative using Questionnaire Technique as data collection. The number of respondents in this study based on the Slovin sampling method is 148 students. This study will be analyzed using statistical methods both descriptively and crosstab. The results of this study identified that most Trisakti students prefer to live in owned houses such as their parents' house, relatives' house, or apartments compared to renting a house close to campus. The crosstab results show that gender, distance from residence, reasons for choosing a residence, and student origin affect the distribution of housing type selection between rental or owned residences. In addition, based on the results of perception, pedestrian facilities, cycling facilities, the presence of green open space, and security are considered to be less in rental housing areas compared to owned housing.
Analisis Variasi Ukuran Partikel Biomassa Cangkang Kelapa Sawit dan Tandan Kosong Kelapa Sawit (TKKS) terhadap Karakteristik Refuse Derived-Fuel (RDF) Riza Hudayarizka; Wulandari, Agustina; Ariani, Ismi Khairunnissa; Yorika, Rahmi
SPECTA Journal of Technology Vol. 8 No. 3 (2024): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v8i3.1212

Abstract

Energy consumption in Indonesia is still mostly dependent on fossil fuels like coal, leading to their gradual depletion. Therefore, there is a need for environmentally friendly alternative energy sources from biomass waste, such as Refuse Derived-Fuel (RDF). Biomass waste with a high calorific value, like palm kernel shells and empty palm kernel bunches (EFB), is promising as RDF raw material. The size of the particles affects the characteristics of RDF because it impacts the structure and composition of RDF pellets. The tested composition ratios of palm kernel shells, EFB, and adhesives were (90:0:10), (80:10:10), (70:20:10), (60:30:10), and (50:40:10), with particle sizes of 60, 80, and 100 mesh. The RDF characteristics evaluated included moisture content, ash content, volatile matter, fixed carbon, and calorific value. The best RDF composition was found to be 70% palm kernel shells, 20% empty palm kernel bunches, and 10% adhesive at a particle size of 60 mesh, resulting in a moisture content of 5.2%, ash content of 4.64%, volatile matter of 78.89%, fixed carbon of 9.64%, and a calorific value of 4404.32 cal/g. XRD analysis indicates that RDF contains amorphous carbon, silica, and, with the addition of EFB, contributes to the potassium content. SEM analysis shows that larger particle sizes of the raw material form larger pores in RDF compared to smaller particle sizes.
Penerapan Inovasi Hijau dalam Perancangan Souvenir Wisata Berkelanjutan Menggunakan Material Biokomposit dari Limbah Tandan Kosong Kelapa Sawit (TKKS) untuk Mendukung Branding IKN sebagai Ibu Kota Negara Terhijau di Dunia Syaputra, Eko Agung; Parmita, Ade Wahyu Yusariarta Putra; Febrianti, Nia; Maharany, Gunanda Tiara; Rossalina, Novianti
SPECTA Journal of Technology Vol. 8 No. 3 (2024): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v8i3.1222

Abstract

Souvenirs have an important role in supporting regional economic development, souvenirs can also function as an important symbol of identity and culture because they can contribute to the preservation and promotion of local traditional heritage. But on the other hand, the souvenir industry also has the potential to damage the environment. Therefore, it is important to ensure that souvenir production and consumption practices use sustainable principles. The increasing level of deforestation and forest degradation in East Kalimantan due to IKN development needs to be balanced with green innovation. One of them is exploring renewable materials as raw materials for superior regional products. Indonesia has an abundance of empty oil palm fruit bunches (EFB), for every 1 ton of palm oil there is 23% or 230 kg of EFB waste. With its quality and uniqueness, this EFB biocomposite material is suitable as the basic material for sustainable tourism souvenirs as an Indonesian identity. This research aims to develop sustainable tourist souvenir designs made from EFB waste as one of the branding of IKN souvenirs for the international market. The identification in this research used the Design-driven Material Innovation (DDMI) method. DDMI is a product design design model that starts from material development from understanding material characteristics, and creating product lines, to communicating the uniqueness of materials to the market. This research produces designs and prototypes of tea sets as sustainable tourist souvenir products that are ready to be made on an industrial scale. Tea sets are often used as souvenirs in state agendas because they reflect a country's cultural identity and diplomatic status, as well as a way to strengthen relations between countries through appreciation and respect. This aligns with one of the goals to support the branding of the IKN as the greenest capital city in the world.
Implementation of the Elliptic Curve Cryptography Method in Digital Image Security in Medical Images Yanuar Bhakti Wira Tama; mujahidin, syamsul
SPECTA Journal of Technology Vol. 8 No. 3 (2024): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v8i3.1253

Abstract

Digital security become increasingly important particularly in medical field as impact of patient privacy and the protection of patient data. This attempt for this research will be made to use elliptic curve cryptography to hide messages in the form of digital images using multiplication matrix modified hill chipper and count entropy and time encryption and decryption. The encryption process, which utilizes matrix multiplication, ensures that the images achieve near-ideal entropy values, close to 8, indicating a high degree of randomness and security. The result is entropy for encrypted image near 8 it means that randomness of image is quite random. Meanwhile for computational time encrypted and decrypted image for one block is around 400000 nano second for encrypt image and 1500000000 nano second for decrypt image.
Exploration of the Application of Holographic Technology in Elementary Learning: Case Review Sasferi Yendra; Putri, Hesti Rosita Dwi; Sartika, Widya
SPECTA Journal of Technology Vol. 8 No. 3 (2024): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v8i3.1254

Abstract

The designation of Nusantara as the new capital city of Indonesia presents a unique opportunity to integrate cutting-edge technology into various sectors, including education. Traditional learning has been the backbone of the education system, but in today’s rapidly evolving world, more innovative approaches are needed to engage students and improve learning outcomes. Higher education, in particular, must adopt modern teaching methods that encourage student engagement and interaction with learning materials. One promising advancement is the introduction of holographic technology, which has the potential to revolutionize the way knowledge is shared and consumed. While its use in education is still in its infancy, holographic technology, specifically mixed reality holograms that combine augmented and virtual reality, can create immersive learning experiences that blend real-world environments with virtual objects. This paper explores the basic concepts of holographic technology, evaluates its impact on student engagement, and its potential role in transforming education. The research identifies the strengths and limitations of holograms as a learning tool, assessing their effectiveness in today’s primary education. Case studies and related research in Nusantara demonstrate the practical application of this technology in the classroom. The study also offers insights into how educational institutions can begin adapting their systems to incorporate holographic devices, aiming to foster more innovative and effective learning environments for future generations.
Expert System for Diagnosing Plant-disturbing Organisms on Rice Plants Using the Euclidean Probability Method and Bayes Theorem with Forward Chaining Inference Technique Azhar, Nur Fajri; Prihasto, Bima; Nadhira Rizqana Nur Salsabila
SPECTA Journal of Technology Vol. 8 No. 3 (2024): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Rice is a basic human need that needs to be fulfilled continuously, especially in Indonesia. However, rice production decreased by 2.05% in 2023; the decline was influenced by the lack of rice fields and crop failure due to attacks by plant-disturbing organisms such as Blast, Brown Spot, and even Ricefield Rats. Therefore, expert system technology is useful to help create opportunities for progress in the agricultural sector in overcoming the decline in production. This research utilizes the best method between Euclidean Probability, Bayes` Theorem, and a combination of both in diagnosing plant-disturbing organisms in rice plants. The expert system works by analyzing the symptoms and characteristics of the plants using weight values obtained from the Analytical Hierarchy Process, comparing them with a database of known plant-disturbing organisms, and providing accurate diagnoses and management recommendations. The objectives are to determine which method provides the most accurate diagnosis and to explore how these methods can support sustainable agriculture. The combination of Bayes' theorem with Euclidean methods and Bayes' theorem alone achieved an agreement of 8 out of 10 cases with expert diagnoses. In comparison, the Euclidean method alone achieved an agreement of 9 out of 10 cases. The results demonstrate that the Euclidean Probability method offers a more accurate diagnosis, aligning with expert diagnoses in 9 of the 10 case studies, thus supporting its application in sustainable agricultural practices.
POTENSI BIOMASSA KULIT SINGKONG DAN LUMPUR IPAL SENTRA INDUSTRI KECIL SOMBER (SIKS) SEBAGAI BRIKET Febrianti, Nia; Selvia Maharani; Riza Hudayarizka
SPECTA Journal of Technology Vol. 9 No. 1 (2025): Vol. 9 No. 1 (2025): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v9i1.1185

Abstract

Sentra Industri Kecil Somber (SIKS) produces sludge waste from the Wastewater Treatment Plant (WWTP). Sludge can be utilized as a renewable energy source, for example by processing it into briquettes. This research uses a mixture of cassava peel biomass to increase the calorific value of briquettes and uses tapioca starch adhesive. The purpose of this research is to analyze the characteristics of briquettes produced by WWTP sludge with a mixture of cassava peel and analyze the optimum composition variation of WWTP sludge and cassava peel waste on briquette characteristics with the composition of WWTP sludge, cassava peel, and adhesive of (10:83:7); (15:78:7); (20:73:7); (25:68:7); (30:63:7). The parameters tested are moisture content, ash content, volatile matter, fixed carbon and calorific value based on ASTM, after which data processing is carried out with the help of software, namely graphs with Sigma Plot and Microsoft Excel software to facilitate and minimize errors or human errors. The water content of briquettes A, B, C, D, E was 4.2%, 4.8%, 5.4%, 5.7%, 5.9%. Ash content 12.8%, 13.7%, 14.5%, 15.6%, 16.8%. Volatile matter 12.2%, 14.3%, 15.2%, 15.9%, 16.2%. Fixed Carbon 70.8%, 67.2%, 64.9%, 62.8%, 61.1%. Calorific value 3301.04 cal/gr, 3245.2 cal/gr, 3223.36 cal/gr, 3187.54 cal/gr, 3172.98 cal/gr. The optimum briquette characteristics that meet SNI 6235-2000 are briquette A with a moisture content of 4.2%, volatile matter of 10.2% and those that are close to SNI 6235-2000 are ash content parameters of 12.8%, fixed carbon of 70.8% and calorific value of 3301.04 cal/gr.
Analisis Kecacatan roti 3 rasa dan roti kering dengan metode Seven Tools di UMKM Bakery Arsyifa Binang, Arum; Fitria Endrawati, Budiani
SPECTA Journal of Technology Vol. 9 No. 1 (2025): Vol. 9 No. 1 (2025): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v9i1.1186

Abstract

In the industrial world, quality control of a product plays a very important role in increasing competitiveness and consumer interest. Quality control is very necessary to impact the quality of the product produced. If there is no quality control it will have a negative impact on the product, such as defects in the product. In this research, we analyzed 3 types of defects, namely shape defects, color defects and texture defects in 3 flavors of bread and dry bread at UMKM Bakery Arsyifa. The use of implementing methods to reduce defects uses the seven tools method, which consists of several steps, namely check sheet, startification, histogram, scatter diagram, Pareto diagram, control chart, fishbone diagram and improve stage. Based on the results of calculations using the seven tools method, the highest probability results were obtained for 3 flavors of bread, namely texture defects with 119 product defects, dry bread, namely shape defects with 62 product defects. At the fishbone diagram stage, to find out the cause and effect of the defective product, problems were found in man, material, machine, method and carried out the improvement stage using the five m-checklist approach.
Penyisiahan Kadar Fostaf Air Limbah Laundry Menggunakan Eichhornia crassipes Sebagai Agen Fitoremediasi Basransyah, Basransyah; Yorika, Rahmi; Beelyada Diwirya, Agnes
SPECTA Journal of Technology Vol. 9 No. 1 (2025): Vol. 9 No. 1 (2025): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v9i1.1213

Abstract

Wastewater from laundry is produced by detergents containing main ingredients that are not easily decomposed naturally, such as Sodium Dodecyl Benzene Sulfonate and Sodium Tripolyphosphate. Water hyacinth (Eichhornia crassipes) functions as a phytoremediator that can absorb organic and inorganic substances. This study aims to assess the efficiency of reducing phosphate concentration in waste and to analyze the effect of water hyacinth mass and the addition of aeration on reducing phosphate concentration in laundry liquid waste. Wastewater samples were taken from Laundry X in Gunung Sari Ulu Village, Central Balikpapan, with a phosphate content of 0.63 mg/L/day. This study used variations in the mass of water hyacinth of 200 grams, 300 grams, and 500 grams with 15 liters of wastewater. The results of the phytoremediation study using water hyacinth plants with a mass of 200 grams, 300 grams, and 500 grams, as well as the addition of aeration, can reduce phosphate concentrations by 33.59%, 27.67%, and 30.67% on the 3rd day. The variation in the mass of water hyacinth and the addition of aeration showed a significance value > α (0.05); 0.665 for the mass variation test, and 0.058 for the addition of aeration test. Variations in the mass of water hyacinth plants and the addition of aeration did not significantly affect the removal of phosphate levels in laundry liquid waste

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